Steam-boiler furnace



G. Gr. VIVIAN. STEAM BOILER FURNACE.

(No Model.)

No. 433,837. Patented Aug. 5, 1890.

UNITED STATES PATENT OFFICE.

GEORGE G. VIVIAN, OF IDAHO SPRINGS, COLORADO.

STEAM-BOILER FURNACE.

SPECIFICATION forming part of Letters Patent No. 433,837, dated August 5, 1890.

Application filed F ruary 7, 1889. Serial No. 299,005. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE G. VIVIAN, a citizen of the United States, residing atIdaho Springs, in the county of Clear Creek and State of Colorado, have invented certain new and useful Improvements in Steam-Boiler Furnaces; and Ido declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to steam-boiler furnaces, and has for its object the provision of a furnace for economically burning logs of wood, and which will consume all, or nearly all, the gaseous products and preserve a bed of coals which will prevent the cold air chilling the boiler. The fire-chamber is divided by a longitudinal wall into two separate compartments, each havinga grate. The longitudinal division-wall extends from the breast-wall to the rear or transverse bridge-wall, and its sides incline from top to bottom, approaching at the top. Air-passages are formed in the side and bridge walls of the furnace and communicate with the combustion-chamber through small ducts. The air in its travel through the said passages and ducts is thoroughly heated and escapes into the combustion-chamber in a proper condition to combine with the gases and promote their combustion.

The improvement consists of the novel features which will be hereinafter more fully described and claimed, and which are shown in the annexed drawings, in which Figure 1 is a cross-section of a boiler-furnace embodying my invention about on the line X X of Fig. 2, looking toward the rear; Fig. 2, a'horizontal section on the line Y Y of Fig. 1, and Fig. 3 a vertical longitudinal sec tion on the line Z Z of Fig. 1.

The boiler O is set in masonry,'and may be of any pattern. The side Walls H are parallel and have the air-passages D I) at a slightly higher elevation than the grates I, so as to come opposite the hottest part of the fire. Small flues E extend vertically from the said passages D D and turn abruptly at e and communicate with the combustion-chamber. Air is admitted to these passages D through the damper d, and is heated on its way through same and flues E to the combustion-chamber.

The longitudinal division-wall A, likewise of lateral openings or ducts J, which extend into the combustion-chamber. The breast-Wall L is provided with the air-passage M, which is controlled by the damper N, and has lateral discharge-openings m communicating with the said combustion-chamber.

It will be observed that the fire-chambers are deep and are contracted in width at their lower ends. This construction causes the partially-consumed logs to gradually approach one another as they settle, thereby preserving a compact-bed of coals, through which the air must pass before reaching the upper logs and the furnace. The sides of the division-wall A may be straight; but it is preferred to have them provided with offsets or steps, which effect a turning of the logs or other fuel as it settles and causing it to present a new surface to the action of the fire.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. The hereinbefore described boiler-furnace, comprising the side Walls H, having airpassages D D, and ,air-flues E e, extending from the air-passages to the combustion-chamber, and the longitudinal division-wall having its side walls inclining toward one another from bottom to top and having an air-passage and vertical ducts leading from said air-passage to the combustion-chamber, the passages in the division and side walls being about in the same plane and at a slightly higher elevation than the grates, substantially as and for the purpose described.

2. The herein shown and described boilerfurnace, comprising the sidewalls H H,which bridge-wall K and at a lower level than the 10 have passages D D, and vertical lines E 6, exair-passages E D D, substantially as set forth. tending therefrom to the combustion-eham- In testimony whereof Iaffix my signature in her, the breast-Wall L, having the passage M, presence of two witnesses.

5 and thelateral openings m, the bridge-Wall K,

having air-passage G and lateral air-ducts J, GEORGE G. VIVIAN. the division-Wall A, having inclined sides and Witnesses: having the air-passage B, and vertical ducts c, F. F. OSBISTON,

and the two grates I I, one on each side of the S. H. VIVIAN. 

